Electrical Connections - International comfort products FXM4X Installation Instructions Manual

INSTALLATION INSTRUCTIONS

ELECTRICAL CONNECTIONS

These Fan Coils do not have a printed circuit board (PCB), they
have a low voltage circuit protective fuse (3 amp) inline on the
wire harness. Speed selections are made at the fan motor with
the Blue wire. The motor is pre- programmed with the
time- delay circuit on some of the speed taps. (See Page 9,
Section D)
Before proceeding with electrical connections, make certain
that supply voltage, frequency, phase, and circuit ampacity are
as specified on the unit rating plate. See unit wiring label for
proper field high and low voltage wiring.
WARNING
!
ELECTRICAL SHOCK or UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal injury,
death, and/or unit damage.
If a disconnect switch is to be mounted on unit, select a
location where drill and fasteners will not contact electrical
or refrigeration components.
Make all electrical connections in accordance with the NEC
and any local codes or ordinances that may apply. Use
copper wire only. The unit must have a separate branch
electric circuit with a field- supplied disconnect switch located
within sight of and readily accessible from the unit.
NOTE: When a pull- out type disconnect is removed from the
unit, only the Load side of the circuit is de- energized. The
Line side remains live until the main (remote) disconnect is
turned off.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Turn off the main (remote) disconnect device before
working on incoming (field) wiring.
Incoming (field) wires on the line side of the disconnect
found in the fan coil unit remain live, even when the
pull- out is removed. Service and maintenance to
incoming (field) wiring cannot be performed until the main
disconnect switch (remote to the unit) is turned off.
A. LINE VOLTAGE CONNECTIONS
Fan Coils installed without electric heat require the use of a
factory- authorized Power Plug Kit (accessory part number
EBAC01PLG). This kit provides the electrical connections
necessary to supply the unit with 208/230V power when
electric heat is not present. For units without electric heat:
1. Connect 208/230V power leads from field disconnect
to yellow and black stripped leads on Power Plug
(accessory part number EBAC01PLG).
2. Connect ground wire to unit ground lug.
8
3. When installing an electric heater, remove and discard
power plug (if equipped) from fan coil and connect
male plug from heater to female plug from unit wiring
harness.
Instructions.)
B. 24V CONTROL SYSTEM
Connection to Unit
Wire low- voltage in accordance with wiring label on the
blower (also refer to Figure 9 through Figure 12). Use 18
AWG color- coded, insulated (35 ° C minimum) wire to make
the low- voltage connections between the thermostat, the
unit, and the outdoor equipment. If the thermostat is located
more than 100 feet from the unit (as measured along the low
voltage wire), use 16 AWG color- coded, insulated (35 ° C
minimum) wire. All wiring must be NEC Class 1 and must be
separated from incoming power leads. Refer to outdoor unit
wiring instructions for additional wiring recommendations.
Heater Staging
If electric heat staging is required, a multi- stage heating
room thermostat is required. Consult your equipment
supplier for a suitable thermostat.
Manufactured Housing
In manufactured housing applications, the Code of Federal
Regulations, Title 24, Chapter XX, Part 3280.714 requires
that supplemental electric heat be locked out at outdoor
temperatures above 40_F (4_C), except for a heat pump
defrost cycle. Refer to Figure 12 for typical low- voltage
wiring with outdoor thermostat.
Figure 9
Specifications are subject to change without notice.
Fan Coils: FEM4X, FEM4P, REM4X, FXM4X
(See Electric
Wiring Layout - Air Conditioning
Unit (Cooling Only)
FAN COIL
THERMOSTAT (CONTROL)
RED
R R
GRY
G G
WHT
W W
2
WHT
BLU
W
3
VIO
E
BRN
C
Y
Heater Installation
AIR COND.
C
Y
496 01 5503 01